{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["instrument agency", "message topic"], "input": "the assigned cashier code serves to identify the cashier using the electronic cash register ."}
{"instrument agency": [{"subject": "cashier", "object": "register"}], "message topic": []}